Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862508 | Method for large-scale multiple source sound reinforcement | — | 1989-08-29 |
| 4811403 | Ultralight loudspeaker enclosures | Clifford A. Henricksen | 1989-03-07 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862508 | Method for large-scale multiple source sound reinforcement | — | 1989-08-29 |
| 4811403 | Ultralight loudspeaker enclosures | Clifford A. Henricksen | 1989-03-07 |